<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <a id="app2" href="/index.html">hello world</a>
enctype="application/x-www-form-urlencoded"   key=value 放在body里面
enctype="multipart/form-data"
<form action="" method="POST">
    <table border="2" width="80%">
        <tr>
            <td>用户名</td>
            <td><input type="text" placeholder="请输入用户名" maxlength="5" name="username"></td>
        </tr>
        <tr>
            <td>密码</td>
            <td><input type="password" placeholder="请输入密码" maxlength="20" minlength="4" name="password"></td>
        </tr>
        <tr>
            <td>性别</td>
            <td><input checked type="radio" name="gender" value="男">男<input type="radio" name="gender" value="女">女</td>
        </tr>
        <tr>
            <td>爱好</td>
            <td><input checked type="checkbox" name="intrest" value="mu sic">music<input type="checkbox" name="intrest" value="compute">compute</td>
        </tr>
        <tr>
            <td>其他描述</td>
            <td><textarea id="" cols="30" rows="10" name="miaoshu"></textarea></td>
        </tr>
        <tr>
            <td colspan="2"><input type="reset" value="重置"><input type="submit" value="注册"></td>
        
        </tr>
    </table>
</form>
</body>
</html>